Toyota Tundra Service Manual: Acceleration Sensor Output Malfunction (C1245)

DESCRIPTION

The trailer brake control ECU (brake control with bracket relay) receives acceleration sensor signals from the acceleration sensor (airbag sensor assembly) via CAN communication.

If the trailer brake control ECU (brake control with bracket relay) receives an acceleration sensor malfunction signal from the yaw rate and deceleration sensor (airbag sensor assembly), DTC C1245 is stored.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

C1245

Acceleration Sensor Output Malfunction

-

An acceleration sensor malfunction signal is received for 1 second or more from the yaw rate and acceleration sensor (airbag sensor assembly)

  • Vehicle stability control system
  • Trailer brake control ECU (brake control with bracket relay)

CAUTION / NOTICE / HINT

NOTICE:

The trailer brake control system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.

Click here

PROCEDURE

1.

CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

HINT:

Trailer brake control system DTC C1245 may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first.

(a) Check for DTCs.

Click here

Result

Proceed to

Vehicle stability control system DTCs are not output

A

Vehicle stability control system DTCs are output

B

B

GO TO VEHICLE STABILITY CONTROL SYSTEM

A

2.

CHECK FOR DTCs (TRAILER BRAKE CONTROL SYSTEM)

(a) Clear the DTCs.

Click here

(b) Turn the ignition switch off.

(c) Turn the ignition switch to ON.

(d) Check if the same DTC is output.

Click here

Result

Proceed to

DTCs C1245 is not output.

A

DTCs C1245 is output.

B

A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE CONTROL WITH BRACKET RELAY

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